Abstract: The present invention is related to a method for preparing an internal peptide standard, comprising a) providing a first tag, and b) coupling of a first peptide to the first tag, whereby the first peptide comprises an amino acid sequence, or a) providing a first tag and b) coupling to the first tag the amino acids forming the first peptide comprising an amino acid sequence, whereby the C-terminal end of the amino acid sequence of the first peptide corresponds to the C-terminal end generated by a sequence-specific hydrolysis of an amide bond, ester bond or thioester bond preferably of an amide bond of a peptide.

Abstract: The present invention is related to a method for preparing an internal peptide standard, comprising a) providing a first tag, and b) coupling of a first peptide to the first tag, whereby the first peptide comprises an amino acid sequence, or a) providing a first tag and b) coupling to the first tag the amino acids forming the first peptide comprising an amino acid sequence, whereby the C-terminal end of the amino acid sequence of the first peptide corresponds to the C-terminal end generated by a sequence-specific hydrolysis of an amide bond, ester bond or thioester bond preferably of an amide bond of a peptide.

Abstract: A process and an apparatus for preparing and carrying out NMR measurements on substrate samples (3.1), individual solutions of the substrate samples (3.1) being prepared by means of a pipetting system (1) and being fed to a flow cell (16) for preparation and carrying out of NMR measurements, it being possible to flush the feed apparatus (7) and the pipetting system (1) with at least one solvent (8, 9) are described. A workstation (54) recording the NMR spectrum of the sample and a computer (53) controlling the pipetting system (1) access a common directory tree (32) which contains directories (33.1 to 33.9) with files which define the samples and are called up in such a way as to ensure that the directories (33.1 to 33.9) are worked through in a time-interleaved manner.